DE502007006729D1 - Process for purifying process vapors in polylactide production - Google Patents

Process for purifying process vapors in polylactide production

Info

Publication number
DE502007006729D1
DE502007006729D1 DE502007006729T DE502007006729T DE502007006729D1 DE 502007006729 D1 DE502007006729 D1 DE 502007006729D1 DE 502007006729 T DE502007006729 T DE 502007006729T DE 502007006729 T DE502007006729 T DE 502007006729T DE 502007006729 D1 DE502007006729 D1 DE 502007006729D1
Authority
DE
Germany
Prior art keywords
column
condensation
material exchange
exchange packing
sump container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DE502007006729T
Other languages
German (de)
Inventor
Rainer Dr Hagen
Udo Muehlbauer
Willi Techlin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uhde Inventa Fischer GmbH
Original Assignee
Uhde Inventa Fischer GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uhde Inventa Fischer GmbH filed Critical Uhde Inventa Fischer GmbH
Publication of DE502007006729D1 publication Critical patent/DE502007006729D1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1487—Removing organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
    • C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • C08G63/785—Preparation processes characterised by the apparatus used
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • C08G63/08—Lactones or lactides

Abstract

Condensation and washing device (1), comprises: (a) a sump container (2) containing a condensation- and a washing liquid (3); (b) at least one column (6) that is attached to the sump container, where the column exhibits at least a material exchange packing (7); (c) at least an inlet (8) for process vapor, which is arranged under the material exchange packing of the column; and (d) at least one outlet arranged above the material exchange packing of the column for process vapor. Condensation and washing device (1), comprises: (a) a sump container (2) containing a condensation- and a washing liquid (3), where the sump container exhibits at least a drain conduit (5); (b) at least one column (6) that is attached to the sump container, where the column exhibits at least a material exchange packing (7) that is at least partly filling the cross section of the column; (c) at least an inlet (8) for process vapor, which is arranged under the material exchange packing of the column; and (d) at least one outlet arranged above the material exchange packing of the column for process vapor, where the drain conduit of the sump container is connected with the column for the circulation of the condensation and washing liquid over a pipe line (10) and the entrance of the pipe line is arranged above the material exchange packing in the column. Independent claims are included for: (1) a polymerization device for the polymerization of a biodegradable, intermolecular cyclic diesters of an alpha hydroxy carboxylic acid of formula (II), comprising the condensation device; and (2) a procedure for the condensation and/or washing of a vaporous biodegradable, intermolecular cyclic diesters of an alpha hydroxy carboxylic acid (II), from a vapor mixture containing the diester (II), the alpha hydroxy acid of formula (I) corresponding to diester (II) and water comprising contacting a stream of a condensation and a washing liquid containing an aqueous solution of (I) corresponding to (II) with the vapor mixture, where the diester (II) containing in the vapor mixture is dissolved in the condensation and washing liquid. R, R 1> : hydrogen or linear or branched 1-6C aliphatic residues. [Image].
DE502007006729T 2007-09-03 2007-09-03 Process for purifying process vapors in polylactide production Active DE502007006729D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07017233A EP2030667B1 (en) 2007-09-03 2007-09-03 Process of cleaning process vapours in polylactide production

Publications (1)

Publication Number Publication Date
DE502007006729D1 true DE502007006729D1 (en) 2011-04-28

Family

ID=38917473

Family Applications (1)

Application Number Title Priority Date Filing Date
DE502007006729T Active DE502007006729D1 (en) 2007-09-03 2007-09-03 Process for purifying process vapors in polylactide production

Country Status (14)

Country Link
US (2) US8430948B2 (en)
EP (2) EP2030667B1 (en)
KR (1) KR101180512B1 (en)
CN (1) CN101820970B (en)
AT (1) ATE501778T1 (en)
BR (1) BRPI0816187B1 (en)
CA (1) CA2698286C (en)
DE (1) DE502007006729D1 (en)
ES (1) ES2359086T3 (en)
MX (1) MX2010002431A (en)
RU (1) RU2471791C2 (en)
TW (2) TWI481443B (en)
WO (1) WO2009030330A1 (en)
ZA (1) ZA201001399B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502007006729D1 (en) 2007-09-03 2011-04-28 Uhde Inventa Fischer Gmbh Process for purifying process vapors in polylactide production
KR200455737Y1 (en) 2009-05-19 2011-09-21 현대제철 주식회사 Steam collecting structure
US8999257B2 (en) * 2009-09-22 2015-04-07 Fina Technology, Inc. Offgas stream direct contact condenser
CN102020628B (en) * 2011-01-06 2013-07-31 云南富集生物材料科技有限公司 Improved method of preparation process of polylactic acid midbody lactide
EP2508548B1 (en) * 2011-04-05 2014-10-15 PURAC Biochem BV Method for removal of the cyclic diester of a 2-hydroxy alkanoic acid from a vapor
GB201112715D0 (en) * 2011-07-22 2011-09-07 Edwards Ltd Sub-atmospheric pressure gas scrubbers
US9282772B2 (en) 2012-01-31 2016-03-15 Altria Client Services Llc Electronic vaping device
WO2014015999A1 (en) * 2012-07-24 2014-01-30 Sulzer Chemtech Ag Method for removing an ester from a vapor mixture
CN104548646A (en) * 2013-12-07 2015-04-29 广西梧州日成林产化工股份有限公司 Turpentine partial condensation tower
MY179674A (en) * 2014-09-17 2020-11-11 Sulzer Chemtech Ag A method for stabilizing a condensed phase composition including a cyclic ester in a process of manufacturing a polyester or of lactide
DE102015206688B4 (en) 2015-04-14 2016-11-24 Thyssenkrupp Ag A process for the crystallization and separation of low molecular weight components from a granulate of a crystallizable thermoplastic material and device therefor
RU2639705C1 (en) * 2016-12-20 2017-12-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) Method for purifying l-lactide
US10266512B2 (en) 2017-08-10 2019-04-23 Novus International, Inc. Processes for preparing heteroatom containing cyclic dimers
BE1029670B1 (en) 2021-08-02 2023-03-06 Futerro Sa Process for recovering lactide and lactic acid during polylactide (PLA) production steps
EP4140978A1 (en) 2021-08-26 2023-03-01 Futerro S.A. Method for preparing an acrylic acid or acrylic acid ester by catalytic dehydration from a recycling flow from a method for producing polylactic acid

Family Cites Families (12)

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US4835293A (en) 1987-02-24 1989-05-30 E. I. Du Pont De Nemours And Company Atmospheric pressure process for preparing pure cyclic esters
US5266706A (en) 1990-10-23 1993-11-30 E. I. Du Pont De Nemours & Company Solvent scrubbing recovery of lactide and other dimeric cyclic esters
US5686630A (en) * 1993-09-29 1997-11-11 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction
AU2001245416A1 (en) 2000-03-03 2001-09-17 Steen Research, Llc Method and apparatus for use of reacted hydrogen peroxide compounds in industrial process waters
DE10020898B4 (en) * 2000-04-20 2004-02-05 Inventa-Fischer Gmbh Process for the production of polylactic acid and device therefor
DE10257577A1 (en) 2002-12-10 2004-07-01 Basf Ag Processing of decomposable gases, especially acetylene, by countercurrent scrubbing with a liquid in a packed column comprises cooling the liquid during recycle
DE102004018284A1 (en) * 2004-04-15 2005-11-03 Wacker-Chemie Gmbh Process for the recovery of ethylene in a cycle gas process for the production of vinyl acetate
JP5355841B2 (en) * 2004-12-17 2013-11-27 株式会社クレハ Method for continuous purification of glycolic acid, method for producing glycolide and method for producing polyglycolic acid
RU2301230C2 (en) * 2005-03-23 2007-06-20 Российский химико-технологический университет им. Д.И. Менделеева Method for preparing lactide
JP2007070413A (en) * 2005-09-05 2007-03-22 Teijin Ltd Polylactic acid composition and method for producing the same
EP2031009A1 (en) * 2007-09-03 2009-03-04 Uhde Inventa-Fischer GmbH Cleaning device for separating dilactide from a materials mixture, polymerisation device, method for separating dilactide from materials mixtures and application
DE502007006729D1 (en) 2007-09-03 2011-04-28 Uhde Inventa Fischer Gmbh Process for purifying process vapors in polylactide production

Also Published As

Publication number Publication date
BRPI0816187A2 (en) 2015-04-14
TWI548444B (en) 2016-09-11
EP2030667A1 (en) 2009-03-04
BRPI0816187B1 (en) 2019-02-05
TW200918151A (en) 2009-05-01
ZA201001399B (en) 2010-10-27
ES2359086T3 (en) 2011-05-18
US20130236366A1 (en) 2013-09-12
TW201434522A (en) 2014-09-16
EP2200733A1 (en) 2010-06-30
CA2698286A1 (en) 2009-03-12
US20100252076A1 (en) 2010-10-07
MX2010002431A (en) 2010-03-31
WO2009030330A1 (en) 2009-03-12
CN101820970A (en) 2010-09-01
KR20100049690A (en) 2010-05-12
CN101820970B (en) 2013-03-27
TWI481443B (en) 2015-04-21
RU2471791C2 (en) 2013-01-10
US8702852B2 (en) 2014-04-22
KR101180512B1 (en) 2012-09-06
RU2010107422A (en) 2011-10-10
EP2030667B1 (en) 2011-03-16
CA2698286C (en) 2017-10-24
ATE501778T1 (en) 2011-04-15
US8430948B2 (en) 2013-04-30

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